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Question
For bivariate data. `bar x = 53, bar y = 28, "b"_"YX" = - 1.2, "b"_"XY" = - 0.3` Find Correlation coefficient between X and Y.
Solution
Here, `bar x = 53, bar y = 28, "b"_"YX" = - 1.2, "b"_"XY" = - 0.3`
r = `+-sqrt("b"_"XY" * "b"_"YX")`
`= +- sqrt((- 0.3)(- 1.2))`
`= +- sqrt0.36 = +- 0.6`
Since bYX and bXY both are − negative,
r is also negative.
∴ r = −0.6
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